Sporting technicolor hair, Johnny Rotten leads the original Sex Pistols in a concert Saturday at the Aragon Ballroom

Fans at the Sex Pistols’ reunion concert at the Aragon Saturday night spit, swore and threw plastic cups filled with beer, ice and soda at the aging punk rockers. Kinda makes you wonder what they would’ve done if they hadn’t liked the band so much. Yes, it was just like the old days, except the Pistols didn’t return the volleys as they would have in their late 1970s heyday.

20 (or so) years of punk: From murky origins, a lasting impact

Scholars and artists may argue about punk’s origin, but few will disagree that until the Sex Pistols exploded onto the music scene in 1976, not many people paid attention. “The Sex Pistols were created by Malcolm McLaren, who was in the fashion business, so a look was pushed on them more so than on the American punks,” said James Stark, author of “Punk ’77” (Stark Grafix). “That definitely made them more marketable.

Green Day Stays Simple: Pure Pop for Punk People

Punk rock, the first time around, was anger and mayhem. The Sex Pistols scared parents everywhere in the 1970s as they spit out songs, shot up heroin and thumbed their noses at authority. Then there’s Green Day, heralded as Generation Y’s answer to punk rock. Green Day members lace their punk-pop songs with anger and tell cheering crowds to “- – – – off.” But they’re the type of boys who buy health insurance for their families.